OpenConnect VPN client suddenly failing -- Failed to open tun device
This started recently on my laptop, when trying to connect to my company's Cisco VPN it simply fails and doesn't provide much information:
Jun 28 08:01:25 winter openconnect[17279]: POST https://vpn.company.net/
Jun 28 08:01:25 winter openconnect[17279]: Attempting to connect to server X.X.X.X
Jun 28 08:01:26 winter openconnect[17279]: SSL negotiation with vpn.company.net
Jun 28 08:01:26 winter openconnect[17279]: Connected to HTTPS on vpn.company.net
Jun 28 08:01:26 winter openconnect[17279]: XML POST enabled
Jun 28 08:01:36 winter openconnect[17279]: POST https://vpn.company.net/
Jun 28 08:01:43 winter openconnect[17279]: Got CONNECT response: HTTP/1.1 200 OK
Jun 28 08:01:44 winter openconnect[17279]: CSTP connected. DPD 30, Keepalive 20
Jun 28 08:01:54 winter openconnect[17279]: Failed to open tun device: No such device
I've made sure that the kernel is configured to load the tun device:
[root@localhost log]# zgrep CONFIG_TUN /proc/config.gz
CONFIG_TUN=m
[root@localhost log]#
And beyond this, I cannot seem to find any more information on what's going on. I know that the client is actually connecting, because we use a 2-step auth service that pushes requests to my phone, and I receive the request to authorize the login. It simply cannot start the tunnel. I've checked if the tun module is actually loaded, and it is not:
[root@localhost log]# lsmod | grep -i tun
[root@localhost log]#
But as I understand it, this shouldn't matter, correct? The module should get loaded as needed by userspace applcations? I *believe* this started after I had setup an OpenVPN connection to connect to a client's VPN, but I made sure to uninstall OpenVPN (as it's not required by openconnect) and the issue still continues. OpenConnect works totally fine and connects to my company's VPN without a problem, on my desktop running Arch.
If anyone can shine some light on this I would greatly appreciate it! Thanks!
EDIT: I found a solution, though maybe someone can shine some light on why this works (and what broke in the first place). I basically insmoded the actual .ko file of the tun module:
[root@localhost net]# find /lib/modules/ -iname 'tun.ko.gz'
/lib/modules/3.15.1-1-ARCH/kernel/drivers/net/tun.ko.gz
[root@localhost net]# insmod /lib/modules/3.15.1-1-ARCH/kernel/drivers/net/tun.ko.gz
[root@localhost net]# lsmod | grep tun
tun 20931 0
[root@localhost net]#
After doing this I can connect to the VPN without issue.
Last edited by snowblind (2014-06-28 13:15:47)
Did you upgrade to a newer kernel recently without a reboot afterwards? See https://bbs.archlinux.org/viewtopic.php?id=163377 for a (perhaps) related problem and solution.
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Copyright (C) 1998-2010 Cisco Systems, Inc. All Rights Reserved.
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32 15:39:19.937 01/27/11 Sev=Warning/2 CM/0xE310000A
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34 15:39:19.937 01/27/11 Sev=Info/6 CM/0x63100037
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37 15:39:20.281 01/27/11 Sev=Warning/2 CVPND/0xE340002C
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38 15:39:20.281 01/27/11 Sev=Warning/3 CVPND/0xE340002A
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39 15:39:20.578 01/27/11 Sev=Warning/2 CVPND/0xE340002C
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42 15:39:20.953 01/27/11 Sev=Warning/3 CVPND/0xE340002A
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43 15:39:21.437 01/27/11 Sev=Info/4 CM/0x63100035
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Failed to active IPSec SA: Unable to enable Virtual Adapter (NavigatorQM:936)
45 15:39:21.437 01/27/11 Sev=Warning/2 IKE/0xE30000A7
Unexpected SW error occurred while processing Quick Mode negotiator:(Navigator:2263)
46 15:39:22.046 01/27/11 Sev=Info/4 CM/0x63100012
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47 15:39:22.046 01/27/11 Sev=Info/5 CM/0x63100025
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48 15:39:22.062 01/27/11 Sev=Info/6 CM/0x63100046
Set tunnel established flag in registry to 0.
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http://www.cisco.com/en/US/docs/security/vpn_client/cisco_vpn_client/vpn_client5007/release/notes/vpnclient5007.html#wp63537Hi Anisha ,
Exact version of OS is "Microsoft Windows Server 2003 x64" .
I need supported cisco vpn client for this OS .
=========
Thanx 4 reply .
Raj -
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We have one laptop that keeps having VPN Issues. It is running Vista Business with VPN Client Version 5.0.04.0300.
This pc is constantly receiving the error message 422. Failed to initialise Virtual Adapter.
Restarts do not fix it.
Reinstalling the client has not fixed
it.
I have seen forums on the net saying to disable and re-enable the connection etc, however the user it is happening to only has USER permissions on the laptop so cannot modify anything when on the road.
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I downloaded ACR 4.4 on my Mac, and Lightroom and Photoshop couldn't read files scanned on my Nikon Coolscan 4000. I read about the recall, and reinstalled both Lightroom 1.3 and Camera Raw 4.3 plugins. My scanned nef files are still unreadable by Ad
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So I just got a 3 months Old iphone 4s which is still under warranty. I charged my phone to 100% last night before going to bed. When i woke up at 8 in the morning my phone was switched off and the battery was drained . This is ridiculous that I dint